{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123047",
    "entityType": "Track",
    "nonce": "0x1d6a0134df6bbf32fbe1ab0008a41c10377ff1b5b552cacc57b8a1817ae8dac8",
    "signature": "0x4cdb62707370046a8f7bd80eae1fb538286acd2b9769263c75bd6a81c48d84aa5bd759b629f8db0d24d8e1dc8c4abd695e3f107a47e0255f6897cc8803a0d44a1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}