{
  "manageEntity": {
    "action": "Save",
    "entityId": "1189640609",
    "entityType": "Track",
    "nonce": "0x55152b3ff41b4585c6b87d9c5db6f87b52f9030c3c3ed0599448a4d6cec66852",
    "signature": "0x415d3686688363e2e9398c439807bc10dc0c045f7628c81f3936fe702a4e4a8571e2a781e48a8f2667e85d411406bc7ea1ca205697f062dfb2e438b963bbb34b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}