{
  "manageEntity": {
    "action": "Save",
    "entityId": "107707960",
    "entityType": "Track",
    "nonce": "0x4c1e83c3b516e0ecd43801575f4ef35a75d88b68fbdf1ede8489d404b1243323",
    "signature": "0x7e6754fe09e2c4118dee5c110395d46976f2a20188de1f7e1a9a5b233814768040bfb80cbaa3688f25e826a28ffe58c70f204a6bfb70ce4fb61ac83030908e391c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}