{
  "manageEntity": {
    "action": "Save",
    "entityId": "851618480",
    "entityType": "Track",
    "nonce": "0x441581fb34571a22c9f82f5d44adcc5e69fb9bf4423a63d9594cab817886c58b",
    "signature": "0xb1eaaf0ba8aaddd3bb6b808d8c5878f3afdedbd5e3825e2e049ec16fec14130d74de97b32b39bcafade1dd7cf221cbef0999b3e40e732f36329134a67066f5e71c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}