{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649084231",
    "entityType": "Track",
    "nonce": "0x96e062a8843f0c384a110d988b6e3db2f10f3b99c7788fbabdefa31b4eb7f1a5",
    "signature": "0xc55f8d6850a619ba531fbeff1ba8fd347df9760832ca77b7033f7a628bf4527613e151f5535d3d970e8303d558364e53dea719497a5ec6237b0b49e0676df3f61b",
    "signer": "0xae1C3C4Ae5D334B4e5218C7467455bd9eA142AE5",
    "userId": "720896085"
  }
}