{
  "manageEntity": {
    "action": "Save",
    "entityId": "1362146646",
    "entityType": "Track",
    "nonce": "0xf65386e0c21a6e143b608644f25ac14fda95ca9e7894a089bc2e5d4d38fd2b2f",
    "signature": "0xb9f10b377122fb6e4641b57bed75a7b17ed4cae235dd7e722bca3bbb47bf60fe7a58994c0127c40c0fc8407477343b45d2d33af73d7ab0379c95fb856b3b0e7b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}