{
  "manageEntity": {
    "action": "Save",
    "entityId": "1506119399",
    "entityType": "Track",
    "nonce": "0x6084449039a058e73d2153a1ab2ca1f76f156c186412ac9f04b33815e6137fc6",
    "signature": "0x5aa03558cb51cfc6c7060580a37723439ebb8460a4842fac586490a7bb389ed005340ba681c4ca788467a99575f31e95f574f934e87a7bca0395178342bed9ac1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}