{
  "manageEntity": {
    "action": "Save",
    "entityId": "508998",
    "entityType": "Track",
    "nonce": "0xfa20c91fd64d557bc3d1e4d61636a5491cebb4622c8e1ee0703be0a3654bb06c",
    "signature": "0x21dcc2a7e7c7184413121cf83162298a8bad8725d91c530e5b5881db382666dd6e9020a1c9b53c9b78b8f5539ea2e5d01191e2096b54174cf3649cdf922afaae1b",
    "signer": "0xbAA633dfD19281ECC20a6b689F49CE8725d526Cc",
    "userId": "127651"
  }
}