{
  "manageEntity": {
    "action": "Update",
    "entityId": "40456963",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd604c93a53a6bd99dde80da0ebd24c82b7bc6bd76c98785d8de5aec9e5298fae",
    "signature": "0x164a3482518f9cca9b49d2b6ef4fd97a17b1b8f62cbdc44220906d0ce10a36497572a490704cb0f96e3d497006be53a33f864275459dee07a97d697d51434a541b",
    "signer": "0xc03B0DC91D4dd69BB843F957bAe8D3B7aA1317EB",
    "userId": "40456963"
  }
}