{
  "manageEntity": {
    "action": "Save",
    "entityId": "752087254",
    "entityType": "Track",
    "nonce": "0x27543f190f1b6bc5818c082c25bc5c7e0f918c02b15c52ae66610afe25622863",
    "signature": "0xad18ec081ffc9da82771314fbeeb905780aa4185eb74d4fc748a221bb9c471cd0ad20956cf95c20ac1e460df1c7d2fd93b6c1f07c93ab9fcf89f2e711bb913a81c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}