{
  "manageEntity": {
    "action": "Save",
    "entityId": "831680607",
    "entityType": "Track",
    "nonce": "0x764c1cd731d4a056bc5d8b6e59147c7d7b6d77823fe5a8be0b777cbe5543920f",
    "signature": "0x01475d8293e16d3ff92e0bc982da830e860c3e6d42b3dab32580c0122e6eb22a23e657520acd50a191553b89cd0507e8b2aba4a2ff48be13739cbe4caa58fed11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}