{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073300771",
    "entityType": "Track",
    "nonce": "0xad3d45cd345eacfe039dd0e71c52b06997e6176fb2980bbe0ddf26596babf3c5",
    "signature": "0xe9b2ba276ecf590b4daf230eded8cbb3a15133012a7946d17d999e796e1bea2105ea91ece218ce238394589a93a7e9461f20a2092639fac881b515546ce5b8cf1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}