{
  "manageEntity": {
    "action": "Save",
    "entityId": "261797030",
    "entityType": "Track",
    "nonce": "0x2928f7e415bb664301baf2ab1e4293991f9aacdc5c6f53c5e87f6e65f4d7f905",
    "signature": "0xe606e65a79ddb51624c9f00085f231ffd0bd2611706ae61d8839a5d0e56a2c395e3d2b64121b87ac8820fd4d6af79889cef2005353dbcdbf3e75fe725f54702a1b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}