{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220370775",
    "entityType": "Track",
    "nonce": "0x3de1ed0a1d63e9f7a86440b1addc836102395a580cb0943bc992062e138a5e4d",
    "signature": "0x42e8e580d9092841d202c848a2c04adeb959cd899e38e574f8f1ddb8d577d21958a1f7da269831e674ebba7f53d686f349b151ffd81eb2dbb6375883238423ef1c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}