{
  "manageEntity": {
    "action": "Save",
    "entityId": "1531369466",
    "entityType": "Track",
    "nonce": "0x9e4611c8f0290b23c8a07d3dbb03b32a2c632ff8b2c3a75bfbd3702848432559",
    "signature": "0x53faf455b83e2479b782012d7e3d6bbcedf89fd2b7751e35cf04d0b6c5842ceb3aede70beeac6f6f0dc0eab0b6139a0bba326dea6394cc485e4d1a9066f432d21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}