{
  "manageEntity": {
    "action": "Save",
    "entityId": "993161668",
    "entityType": "Track",
    "nonce": "0x409912b9eb35d64b5ab3886ab277f755009f7441297c2c255c36a6d2112f4713",
    "signature": "0x1b44142a65dbd50be0e1065674c2869db44a7d456ca877c8965167e4f357ab56247118da8f57a909063eddadbb1132fd7492bb1d4bb72551e522c3194996b7421c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}