{
  "manageEntity": {
    "action": "Save",
    "entityId": "415818",
    "entityType": "Track",
    "nonce": "0xa4fd44b22f0b3a6c9c8d018b7c565e1dbe39fd06f020cfdb3a776c137bc5b0f5",
    "signature": "0x5b5e49c95efe9a6d3ee94f124525978592e12d613923ffccb4fd3562ff3edbdb6ba33c76135e20b5296b077b054c615550c67733640e28b12cabb8b02f01ae491b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}