{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309757548",
    "entityType": "Track",
    "nonce": "0x2574729cc65b9d1d0926617718e594951ee8a4bd84f371d20fc5f91af49f8e5d",
    "signature": "0x2e76cf8708b271422d866da727e65b37590216907f8ae9f85c1a3eaa42c735d21609f1daebe6595aee55809f48bca0ccab8ef90953b2b2aab92776b31ff079d51c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}