{
  "manageEntity": {
    "action": "Save",
    "entityId": "952939748",
    "entityType": "Track",
    "nonce": "0x5d2255a3bee6acabddbfe2f54f95a32fae1e3c563af5b8b1135652c96974bcd6",
    "signature": "0x91db004a4094a839787936c5c2cf9c8aac92839dfe4491363d1b7753afe68a8449cbca9a4a37aa6e61418f8e9928a31e812d630edebd9471b4a741b7cb667b461c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}