{
  "manageEntity": {
    "action": "Save",
    "entityId": "733740",
    "entityType": "Track",
    "nonce": "0x707ef0ccca149c6d63819c9c2d53d4c364bc665f3a9af0fad87e317343f42c4f",
    "signature": "0x45be851d32306f3fbbd9839dba7cb60116d08f55834f982063a6e251f08754a9334d4d4e64cbf9fffbae54b70ee03981e4ce0374a15a37f24e48199a633ef8d31c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}