{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739637056",
    "entityType": "Track",
    "nonce": "0xf2d6650ca08e7c6c7988253df540f3563ef0bf707540058632be310a21635b4e",
    "signature": "0x74df2d3f47366b553848e3b1eeeb87cb5075257590246e825596e489970461f634852f565e4ab8c62591d1463e5dded09b91807f2f4db8e1d08be553ddb6b8211c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}