{
  "manageEntity": {
    "action": "Save",
    "entityId": "322296",
    "entityType": "Track",
    "nonce": "0x9f427d8ec036da3868e52c28baa5c8337b607405f157b30b6787070cb7b1c2c3",
    "signature": "0xfc0b7fbd18f2d321011b81a12b9b9097728b8d3d504a8605d1b7dad0e714a3902eb4ecb1344743de3fb5bc45da9f8040d0b5e03f4e53ed62bf382ba6f77f94761c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}