{
  "manageEntity": {
    "action": "Save",
    "entityId": "583254",
    "entityType": "Track",
    "nonce": "0xf6cebf6bf13682da76d625546c09464169485c1b8ebd32500d83885df82f0620",
    "signature": "0x938c6f533c401504f5c2abf7add13c513e8a8b6207af9ee166c5d06c082b253010726e9d3c9fd627ead5c217308bdf256b1b47464131483b9a596c9c368c2f361c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}