{
  "manageEntity": {
    "action": "Save",
    "entityId": "634992922",
    "entityType": "Track",
    "nonce": "0xe3258437e957c4afe00325f7b9d304585eadb24900ea756d98efe9e4dc4225ae",
    "signature": "0xe1197dbfc5c4544f648d366b11d492349dcc169f2b1b28fcfebbe93d37e8929b088418fb3e47f189f965660c96f8c7a5729228344e4cef34d386bd4e5cf75ac91b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}