{
  "manageEntity": {
    "action": "Save",
    "entityId": "696219224",
    "entityType": "Track",
    "nonce": "0x2af5c96d85ccaf8dfd2353ce39d15a1e8b98d584a147bf9e1a57507404b9dc01",
    "signature": "0x7f7fda9280da09a213bebd2f4bf96857ceae303c83969714cad200f95d918c697da1c5a1464bba03b33f3a6eb099e7ea811d0eb1f8f57605f7fa8952a763b7421c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}