{
  "manageEntity": {
    "action": "Save",
    "entityId": "114959860",
    "entityType": "Track",
    "nonce": "0xa2130b4ec53fed9c9b41466d10f99b8a355ace22a6f531389244d6b4c345069f",
    "signature": "0x4b5bc0b2f1cdb17101157cccd970acc2f02a2e7aa34595a599625e7b0f13aaff01609153147ed03ff05cb24bad5bf7744ed004a52fdec3e7b30bdc2038f7ca261c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}