{
  "manageEntity": {
    "action": "Save",
    "entityId": "2015969101",
    "entityType": "Track",
    "nonce": "0xe64510b87c0d0e910bb1c12eceae620e345c3e0fcb31c2b5969a71ebde5209fb",
    "signature": "0x9f181945f89f436648395b41aaf7ba25c1b58ffa3a01bfee3dfd6a634c67ff68641d911a457984a6673d964a3c3a7e06393bb9eb26b873055e3636d4afbdff241b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}