{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057238",
    "entityType": "Track",
    "nonce": "0xefdca3b28db3c76a9694f6d948942202b19602c91c2960f7785f107cc8b6c539",
    "signature": "0xb140b7198ce99ba1eaf4256d1b428fc5af2ed3af5e44cb1671f212fee549f5231c781d8a1e5275203c078e335f8f43b3122dda4ebad31c3401acd5dece1b8a8b1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}