{
  "manageEntity": {
    "action": "Save",
    "entityId": "178250",
    "entityType": "Track",
    "nonce": "0x41efd92d1268ca3669dbbc7675a8f612295fedf915e3bf05c5cdb9a748674076",
    "signature": "0xf8e8f817b547de6d7d344495113f8e70cac0d4ebcc3a775052db6bb614a7e591393738301f0f3517e42951942d4b4083394459fa8e0fd740b8ffedd9cdb09bfb1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}