{
  "manageEntity": {
    "action": "Save",
    "entityId": "537694928",
    "entityType": "Track",
    "nonce": "0x77fb21241b2fd11668b47083154a2e49635807a8e7e1fa49f64fe206d42fc1ec",
    "signature": "0xa0f9585b2ef64aedbd81276840e76faf6ba5fca612e45c37dee4d7fbf0ae40e07413b4282e49b76c734ac1c0183c19d8cdb79cc11db2bc57ac2cb8a7c2600ca71b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}