{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754842139",
    "entityType": "Track",
    "nonce": "0xffeebf29f6d4200c9cf293428a971d736d1d87634b8e525ccc0aaf69a079db2d",
    "signature": "0xa51b7f930a1a9adfde4c679393dde5e8f9de8516ce8149597355f9650ea2ec0c21fabbc3004e2ef829ef1f661e8bc71b112b38f999dcf95f7f89e45ad55d8ac71c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}