{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808832801",
    "entityType": "Track",
    "nonce": "0xfe5d92169f158e859d3db646193a6964649bb4d88f34ae8763950492bedde479",
    "signature": "0x3931e7976fe243a65839d89987657cf7a8e7074b0e7e50c6eb917823efabb8ad3289c2a039caf5e8e975f1e36cb00630ab765a566f1c5bff62f2ab989e1de0471b",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}