{
  "manageEntity": {
    "action": "Save",
    "entityId": "210954115",
    "entityType": "Track",
    "nonce": "0xff7486989b7f201d6dca9af2744c01d58a9f5d477343355b8f3339868ab4905b",
    "signature": "0xba6291800f4e726327a4e63fe414a9cc62144e1e720cb59c47619011de910966281a9f7b6af02e0f248690565dbd766f70cde32b424d39634cee19cd18449e781b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}