{
  "manageEntity": {
    "action": "Save",
    "entityId": "238349420",
    "entityType": "Track",
    "nonce": "0xc4afd363c35d747d17e9176fafeaf7e1f63c4697ced9b859bf87b20fb941e36c",
    "signature": "0x98c0480112ab0fb0c6c519a67e09695315c842c142d8b1387b78dea230db4ffb6340ee0378f35180435996ac30e8a9b0636143aa9219ee719cc0324fe4e69bd11c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}