{
  "manageEntity": {
    "action": "Save",
    "entityId": "774910001",
    "entityType": "Track",
    "nonce": "0xe0a361e4c374d29a3271964c0dd8de8dac44c5a5d0771efae5456a60e8e7d3d1",
    "signature": "0xc670c5342b4d714332108e052f3d413d1a4acf5a9ac2fd8025aad07bd20d9a71731c2b16092430a1f8b3bce5a85cdb1dd23728264d2ee1642dbf1a412a61b4311c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}