{
  "manageEntity": {
    "action": "Save",
    "entityId": "955946",
    "entityType": "Track",
    "nonce": "0x126076a29eb3a09c12b234d22e2ab8a604bdd63bb0577d1a010bbcb8862ceae3",
    "signature": "0x4fd7aba57785f57cd87d2356dd68c8ef1f4e38de8806b0448a28854d465a924b1a6a7c94f5191c20edd12638c8d46ca871647d275471641b77b60fcc078f02351c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}