{
  "manageEntity": {
    "action": "Save",
    "entityId": "2028698672",
    "entityType": "Track",
    "nonce": "0xdd5e763bc6e2a37d17080729a090fade12627938464a83fd2281363f53372512",
    "signature": "0x0cb871dbf08817df1de9d4bc8e25546a2fc7cf9828192cc3ddc85fc5d457788a2f111265777bad0914ff45376ba733e89456f0118dc73888281afa907f2554be1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}