{
  "manageEntity": {
    "action": "Save",
    "entityId": "85016",
    "entityType": "Track",
    "nonce": "0x9dff54deaa23ab7287c3582a0d1cef257fd5b41d3a56f3d91d069aa8c16e55d6",
    "signature": "0x7b6e4b621aeb86d193b3794a534c66f07042eb3ca707d0e1e4071eb50d69c87f085b6d85254e924b5df900c33125a4fe2def042f72d5dd41dbbb328c21a2eb991c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}