{
  "manageEntity": {
    "action": "Save",
    "entityId": "570373296",
    "entityType": "Track",
    "nonce": "0x592a18078a6080b415bb887268d6100e2ef1b932ec6e3425229e2c0b72b18ad8",
    "signature": "0x1eeb37e382fd47142c163896d220079ae3f03c84e9105b4b32a8eac2b4124efe5e049577b03389494d8424093b8577772cfb564617da0de461499abf55fb660e1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}