{
  "manageEntity": {
    "action": "Save",
    "entityId": "585584113",
    "entityType": "Track",
    "nonce": "0x1f757a09e3b1e57a805855c82b380f9375cce1eeaa760b6f1a42d0bc87481db8",
    "signature": "0x4271960d2d59c23dedf0386021b0962c6b50541d6defdbcda691c2e7f2db7fb04de76ec4c9a34f9ba842c91a8e16980c7decec7e3541915fc58447893b501ff81c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}