{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781179367",
    "entityType": "Track",
    "nonce": "0x5c1391a505698ce71b2ba545ab71b7322ab4d382d192f50ad23056eb9d3518db",
    "signature": "0xd30ec0f67c73cc861b73a2309d5f295e493242e71022e2772cbe114c33e1ac56019c060915536a42ca736da7e42dab57039a1c5c777541fc8411bdbe4d0306b51c",
    "signer": "0xE4798770a951408B407807D3d07D6e572dA538FF",
    "userId": "181315335"
  }
}