{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588019696",
    "entityType": "Track",
    "nonce": "0x3521257db5e9f558897697580c358c49e842b8b5b381487117bd45d113e3d437",
    "signature": "0x9796e7a1a82d72fb9b9bbb59a087e0f0f4ede44f6a1e4e0dec760c652db2ac3422d78fef71f5dedbb1e908d50bc1693578d17c30bbefbd1bbcab5e6a780b2d5c1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}