{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618741377",
    "entityType": "Track",
    "nonce": "0xd4414e7cd816db336551a1a618cbf5ebae433e5cf07c6c0ca744584d3a57fe39",
    "signature": "0xc32d3a7a2c2987fe6723cca6d7e4549fb7d58e68843c4c2ec9d54148fb75dc406d7855cf6dd79030ab35160b957da86547589ff50b27493ee4bbdc077865a6fd1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}