{
  "manageEntity": {
    "action": "Save",
    "entityId": "949536715",
    "entityType": "Track",
    "nonce": "0x17de1c26b233fbecc460e2b3c5a698c92bb209fc57f11cce169e4d9d33d1bd80",
    "signature": "0x6c1e8532e85d3d412a416bd95c4919c6eb0d13005c70534951db0fd5a1708fca16710e192b5aa47a31666a0968d0519cc57ebec9e2a58fab9cd5d3e11a8ca81f1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}