{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886664918",
    "entityType": "Track",
    "nonce": "0xea97e2b7d3b8f1359ae8f3bb603534ff0a1510dc6589c9ef62efc4203043ef70",
    "signature": "0xae49e1dd6ed5fba7f48671b53512ea0b6429ca1a636c6ab2130665af1d1aa8b05f9bcace510ab5b07e5177efd43db19bc6f251561779b595a18ba9d475f192861b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}