{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592708620",
    "entityType": "Track",
    "nonce": "0x9ff13e8dbc9d81e4aaf95e15c60f501e39c3de49696238394afe53e07367ca1a",
    "signature": "0xa52271a5697547d8616787be905c08e9560df9fd4c8400fac7014f0bf2396e734bba210318c6ef257fb20ac3eece320d033df493a99808819b347c57ec67ea121c",
    "signer": "0x934E45BE36e38037811AEb6F8eD448164c45408B",
    "userId": "582278090"
  }
}