{
  "manageEntity": {
    "action": "Save",
    "entityId": "514424",
    "entityType": "Track",
    "nonce": "0xf2793aef4d8ae9e5001300f34a9f47f07c42302dcff7608b61c9e96574ebbd6e",
    "signature": "0x060b38cb1f25ac50968523d5b442a01ceca828f746a9f8f0bfa35255a0b0e0c63152ac3af6bd32e05ca04e25628018ce6d36a07890ab5859d599d830863482ba1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}