{
  "manageEntity": {
    "action": "Save",
    "entityId": "794421217",
    "entityType": "Track",
    "nonce": "0xf631970a5f478c2642c98089e93a92782150a836d9e112cd09eabbfc3f7aa0c8",
    "signature": "0xc941b59435a481c477c85a1a3beb4c741cba910316f224cbc11b37546c6721f4288511bebbaa3e341e8f42dda59cd2f6815aa7d6f3164333987b824bc3a88f821b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}