{
  "manageEntity": {
    "action": "Save",
    "entityId": "1175687921",
    "entityType": "Track",
    "nonce": "0xfaf622db123df9fe351a7eb58fd5ce6934e3d69e2e2af44355858327650daf2d",
    "signature": "0x349d163bed090ff12760a8f08e35f721d52b51fd3cf04aba2f73631f00b292711bccdffef8b97b64c20352ef45035865566553347159c3716f5c81218a57f87c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}