{
  "manageEntity": {
    "action": "Save",
    "entityId": "731963582",
    "entityType": "Track",
    "nonce": "0x528bb5d6ba979100115a787f096d51feed9c6bad0eb39c7048e2716ec621b5bc",
    "signature": "0xe025e57e7f6d96c3b631870cc8243246d08c04529aca23c985ab79dbc9df35864e26788b1d5cd7e2737ed5f894d12e7ad257d0c3d95b8465f9655e40ce435e0c1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}