{
  "manageEntity": {
    "action": "Save",
    "entityId": "1022103",
    "entityType": "Track",
    "nonce": "0xa876c8c514dd1506dc331a4066b425e8c08c39457ccad4e6e1064b11ad692626",
    "signature": "0x73c3d8ef8750e2bf593f14f5c4c36fd81234c117786a17e5d239a14fe39ae3963e1c1fede939009c2a8c4a39dbb22a0e1d14c14562dcc97b4080c45de05fc52d1c",
    "signer": "0x0d64ab35A633F9E400Ffc4CC92D8950BEedCE627",
    "userId": "141667420"
  }
}