{
  "manageEntity": {
    "action": "Save",
    "entityId": "694091",
    "entityType": "Track",
    "nonce": "0x8cca702c24777861f365b6eaef15b3ea81b715e69b99ecfdc6a648a19b7cada3",
    "signature": "0x3afbba33f9afd77b38524f647d879bdbedd92ab016ac0b9ae6abb7d4ace6e23c30d8603a4958a8c73924976638bc3225d3ffd9e57f88469ba4417a476e5a0e651b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}