{
  "manageEntity": {
    "action": "Save",
    "entityId": "301332",
    "entityType": "Track",
    "nonce": "0x89d03acc2fdd884209c2607ddcfb0e5f3a6c0d9653d8acb3643b45a72931d4aa",
    "signature": "0x4680cfa32a12e9cc1edd98a13b461d469e1e027484c8bbcc61604970c8c8565035b512972304ae5a6bf25c5bd7e30045cf4bffd3d35dbf100f57393ea85769131c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}