{
  "manageEntity": {
    "action": "Save",
    "entityId": "1612296305",
    "entityType": "Track",
    "nonce": "0x91fec90dcbbbd55160a63fc641951974d5504a19c2409786b4088b203e5d1512",
    "signature": "0xf7d07bd69daa5fa74717b8c907d0c74497124a15a0eaca3ccee609364787d1030355f8273f5a2c760e68e1436cf23efe306bd0a1f82ba38d9042784fb1444b6b1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}