{
  "manageEntity": {
    "action": "Save",
    "entityId": "2028674157",
    "entityType": "Track",
    "nonce": "0xa3a24290f7225c0a34506c079ded07a9952a5618e97374307b94a9b35fff875e",
    "signature": "0x17f2acadf2681efb374b2159cdfdcc60f8721eb65d59d537fe0a0d0f4c96ee77581ec39913d3841d0b876317769b6ce06b3043cc328e3b66bf894d700dfdbba51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}