{
  "manageEntity": {
    "action": "Save",
    "entityId": "722782031",
    "entityType": "Track",
    "nonce": "0x541087403b84b9886bcf6a7991ec400a951086d3e84716276202fa69169c8a1a",
    "signature": "0xdf77d85a8b99aec5d51581ce6415fd1a713c8f7ac8511a731d0169a0638cbede1c24620f89cef94a0be52c05e477629d252df64a2c5d0f7434091c06006ef78a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}