{
  "manageEntity": {
    "action": "Save",
    "entityId": "289796874",
    "entityType": "Track",
    "nonce": "0xed11f20c2e1ac1aa63084104d60f620ba24a1b3a0e40825b49ae7b0826b09349",
    "signature": "0x793400e154b1de02cc753ef0ea5511934acf7fec5f2870b0cd6dcbe24ba961ee0953eaa0bd3b98548080d5e78e1a04859bb905644bee3e626a75b5652b7648881c",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}