{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875797459",
    "entityType": "Track",
    "nonce": "0x94e81756541da7e0c8a9991b6218a5bb47950eb831e8eab6aa664e92e563a2ef",
    "signature": "0x6503e9c20e1c12654a2262d3fd796474bb2524419c8b7fc061e6b8a790c501e10fccb282fb67321efb4f6d4be77869041df2cbd451b7f9e9e3f0ddc5330e98501c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}