{
  "manageEntity": {
    "action": "Save",
    "entityId": "505916",
    "entityType": "Track",
    "nonce": "0xdcc820d8b42ce50cfaaafb29c00cb439b7c54efdd1b12c9d4674f9b2f7adbe2c",
    "signature": "0x9740f59c0d4a8528b8d815f9928468f7304991d1f8fe16d8abe23a392560deed228e4c993fa9895c00e9bed3dcdc320a6f378200d1f5734c67d25ab2be0d9aa91b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}