{
  "manageEntity": {
    "action": "Save",
    "entityId": "5037",
    "entityType": "Track",
    "nonce": "0x71a252ecd04cb4976b1a4a5a15fb4b354119197d8a4e08e4770c3ee0b27917c6",
    "signature": "0xd003de5c3bf551385a92e96b812257dba169a8c70a4959e724d5a1fb82a5ff4d6ef7de6afb4bdca543fe98cd4f143a9a596550390fb53c6834a04397d763df081c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}