{
  "manageEntity": {
    "action": "Save",
    "entityId": "1899615736",
    "entityType": "Track",
    "nonce": "0xe47e11752614257c638835c64bdf75e62924f1e59ebb0c30c3af06ac75e271bd",
    "signature": "0xbe29fc33fd7c218150640cf0d9ebb756847eb5a4ee7f49e09bb973d988beff05412754ed1a0240734317f82314f911b0c0b9940357ae5ea772f35b2c3b20fa731c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}