{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975310146",
    "entityType": "Track",
    "nonce": "0x2827625707925f10a396ecd00660488ab76f7f81d7bf8dcebdcb61d3b784fb00",
    "signature": "0x247fa396ac31e0c16e201271585412fd233633a02e477068fba74b79fd045c9554852ec35143fe0a188cd63c7a26676bd734c46c032dcde84c1b6807a26538a51c",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "2047015"
  }
}