{
  "manageEntity": {
    "action": "Save",
    "entityId": "411549",
    "entityType": "Track",
    "nonce": "0x38ab9c2dc592c879dbd178d19217ebda850eee5e9979285f174589209091ce74",
    "signature": "0xa74d6bf77af61ae9c842b7a990e10e712e9648d0730da92a5d1e9205297b2080298550b16dc4528f6c425fc76a506bdff987c68eb6e4262d1c4b7e7b9d5da39c1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}