{
  "manageEntity": {
    "action": "Save",
    "entityId": "553748380",
    "entityType": "Track",
    "nonce": "0x4651d479d0896d9d341a79c390f9b09f2136f52d67bc275c2d4ede75723888c5",
    "signature": "0x82f009bc5ba2a42f20c2a0abd43189742be6a5849b42aca262c85610d4e2959e3cce14adfbf9e12b489e9065fc44d1125f7d5110787871fec338294fe91fa59e1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}