{
  "manageEntity": {
    "action": "Save",
    "entityId": "1655518962",
    "entityType": "Track",
    "nonce": "0x73eff9307b1e507d070a42f5498cfe5462c3baacfac790982b437e786b9725ed",
    "signature": "0x7d6fa326b541f1e4861119f38a04a999e8d9e131f1df928457a16fb7b955610859605e55b4d532c90e0df1ee9ba2d0fa386e211749cb05ad677620c63da2db6b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}