{
  "manageEntity": {
    "action": "Save",
    "entityId": "101274936",
    "entityType": "Track",
    "nonce": "0x1b9d552e0ae7f4a11369f00ed8d9e413ca8efa579dcd381432ae042a6288a208",
    "signature": "0x4096a09cbbf147f2d5f94c72634c4849c13cd0b49d475932b46083f1779377ee26bff6bfc274b73720da0b58a886467ab8c0a491633a16406440bf5fa6d0e4ad1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}