{
  "manageEntity": {
    "action": "Save",
    "entityId": "825330279",
    "entityType": "Track",
    "nonce": "0xd8dcf21e5f6ff1985bd183e02cb729e0b84cc1b60c138bf2a089549a515aca2f",
    "signature": "0x7fd7022ca0bd55f502f78a518cb2bbd257e753d88a22c2ef4a2cba9654fb7791046cdce63c58879fd09b9016a70962ed59bfd93e25c81e27b8f006c1cfae2eca1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}