{
  "manageEntity": {
    "action": "Save",
    "entityId": "1157871982",
    "entityType": "Track",
    "nonce": "0x531e598d22dd78a158da276df1a9d83efd595d5a955bb6397b5f12bebe615cf0",
    "signature": "0x430e762cc8d6bfd056931897fe8d834be92213bda4dc1a4226fd736f56e8064c100c6f2ff5acbd13595c5e736b70dcdc024ec5adac4234d74a465d0f52af0a401b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}