{
  "manageEntity": {
    "action": "Save",
    "entityId": "1395903772",
    "entityType": "Track",
    "nonce": "0x7b9a31a670107ef4528748377a75818ca063a40f247479fe091e8bdbf69c9f56",
    "signature": "0xea826145a8eb34a51a0894f08a87c99c411d0ab9a02e8b566e6397b0432bdc4d73b2c3ca814a1c99bdd21e16ef0168acf0c78e95f3658d656726842feac052b51b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}