{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177871867",
    "entityType": "Track",
    "nonce": "0xc19f92cd8c3b0353cfc8f4cc4aa56a9e40428c334340d60299f9fca2b5a68e7b",
    "signature": "0xc4e7f7a504dce90dae8a0dfb72a6fcf00001e94106ffd57227fa0e94cfc23280013d0f8b78f2ff0165962eb91f54a6972082a78f13b0cc00d9891ba9fa2293271b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}