{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040430453",
    "entityType": "Track",
    "nonce": "0x9e5be2ca9e600f5a4c95f4f8dd8ae7aa2816ed497fba578fd0e078f32c0bc6d5",
    "signature": "0x0b80fdf8027b9ee4a387d5a845813fdee18ae2ae144343fb92ae03b291a9d75b038dc953d54e41381ba51ece0d1babbbd7ee6a42d8aeafefe822497b2aa222fb1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}