{
  "manageEntity": {
    "action": "Save",
    "entityId": "674888814",
    "entityType": "Track",
    "nonce": "0xaa2727cd3e15bfb704afbd30f79f348370f5ce6632e4dbdc40d79f1e9d1ac919",
    "signature": "0x4010f04ee521b74cd5500f2955741f19cd39fad8812780f9d729a4a0d35a1f4d2bb3ca17289a631a77fc814a3e1c332bcf181284848c99a8f126fa2035990bce1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}