{
  "manageEntity": {
    "action": "Save",
    "entityId": "406095",
    "entityType": "Track",
    "nonce": "0x239297230c1d80cf955573fd7f73da621817fd4863232a02f1597346d002be7d",
    "signature": "0x70b9e00e9f58454aa2d4088847e468a9bf34afde89c6250f8f376f36dcb0de84641c962f3c78fc172c00ababbe2fb827d65655e611c7b3b94af8953d5c55784f1c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}