{
  "manageEntity": {
    "action": "Save",
    "entityId": "694217204",
    "entityType": "Track",
    "nonce": "0x90d9b36061ce115b5d30cf3938ba2dbae60649e037cd405f03a8cef968a691f5",
    "signature": "0x3a76fb13e7cf457ddbf62464b6d971aceaeea64e4ec9525f547c423514a2d31f5937de82bd3e693b3bb93fa835532b62ece88afcbb49f6e0f6768dd09d4fc9181c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}