{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915117492",
    "entityType": "Track",
    "nonce": "0x952e211ba834a12ebc707c6f56aa06fa4f666b7d4ab9bb7877fe0cfd0bad519f",
    "signature": "0x3d475f0801afddaafb42cbdcd20e2875fa5b9f678e290084145deafdab6861e63102caae941f2e0e703830d8678ac6bccf5722b2537d295f0a536a2bae9ba0541b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}