{
  "manageEntity": {
    "action": "Save",
    "entityId": "12808",
    "entityType": "Track",
    "nonce": "0x44aa8b9a00227a6817edc75e8f59862315847e25d44a84e435aadd60afd1a5a3",
    "signature": "0x70c71b12fde0fb109e9e9ad5caa5b294a3e841060fccc095d38bb0d8cf9027d235e38c314ea0f821738791ddcfd004e35d12a474ae154d11142eddd86cb517a41b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}