{
  "manageEntity": {
    "action": "Save",
    "entityId": "592140",
    "entityType": "Track",
    "nonce": "0x08ebcebba822e40aed554c7c259a87a68b52240780ee659dd5844c716a6cd860",
    "signature": "0xb8c55ca9528bb8b7988bb52c761aa4632cea73d88098d0da50610946080553ed7136406b48869e3e0847e541e3655273e1ea667b464aa03c81f7abd6e1959e7c1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}