{
  "manageEntity": {
    "action": "Save",
    "entityId": "952812232",
    "entityType": "Track",
    "nonce": "0x4c502d4a3ff726ee9ff23803d2310e9a4fb3fb9dc310788bd38751f7b0c630a9",
    "signature": "0x511cc952a21b06db3726d0f42ad3453a4e33c735e49feff290fea5b0142601a23b2212b52b304bf62d9e0ff27d18bc29c989880956a4953014db6d4d9ecda9c71b",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}