{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029654230",
    "entityType": "Track",
    "nonce": "0xe656aa7adfe6ba7c45a854f69db7e7b0408702a4f24739ff20738eae8f9fba4f",
    "signature": "0x6097ff6f2ab4d70ae10767435c96b2ef8c3ebbc313557f689866b7bc56d5448f7d8806ac3eb7b12e37856f89e892efe4c8fe4f6eef8b25b1a959f2e27e2da1e61b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}