{
  "manageEntity": {
    "action": "Save",
    "entityId": "647046",
    "entityType": "Track",
    "nonce": "0xdb0eeb06d60388d0abe49261d61bea79098e66807f5af8eb510c237912735845",
    "signature": "0xc87379079a94813828ee638b3b590c51604ba194e4f3ad1713ee9de798eb93a431276660a358ec1e366de62568d1cc0d0a54b23ad0a45ceb192b8d82758b4b091c",
    "signer": "0x8d9D00A94c3B1C9992e3CA4386AbBC6345B2E876",
    "userId": "396658415"
  }
}