{
  "manageEntity": {
    "action": "Save",
    "entityId": "1347144731",
    "entityType": "Track",
    "nonce": "0x89e929816f964f93f7a18e37bd7ff7832aa979f6d9deb26da9bb45cd4ec1a6ed",
    "signature": "0x9f56dc7f8c958e780a1cf4d9b3513d9f82952a49fbd1a0a628668ad0ca21eebe787b6da69fc1ada7d2e6203c7350f8fb887a2765cfd978f95b60fcd558cf33481c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}