{
  "manageEntity": {
    "action": "Save",
    "entityId": "551316",
    "entityType": "Track",
    "nonce": "0x1ace672b49c338c5a49e091d568d16781f425256d64247132437a1d7de65c937",
    "signature": "0xbc7f5aa90865213b1e2b3bc3d615caf3db73cbd2f0cddcb0eb2a41aa3e5343e13b32aaf12dd479f0b3d198816fbc47cdde3a17e0eef15f9647b9a522c2a6337d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}