{
  "manageEntity": {
    "action": "Save",
    "entityId": "996287752",
    "entityType": "Track",
    "nonce": "0x25830918aa3f73fcc5273fc9b3e971f12150f41a232d2e8d97c3c2eb1a04d289",
    "signature": "0xdd2fc67f7eec04554c834e5e26c7ffb6e77ce1ad6ee3053460250ee2c7a154ff013235bd5e3aa4fa53434bf6c53cd4f5cc6da20137f2b43dc5a44cd0caf286281c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}