{
  "manageEntity": {
    "action": "Save",
    "entityId": "569192301",
    "entityType": "Track",
    "nonce": "0x0099ce3bfb0bf251f93560be8e4b35c85aae85da93dc783e092e4f37ff40edcd",
    "signature": "0xccb9e78b01b3902d079bc872e355f531b659ec47ba82cf4e519fe887860695873193ccfe86c97e85d28821ae6b152605bc1147f22779a85b39bf3c3c28b5c5f01b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}