{
  "manageEntity": {
    "action": "Save",
    "entityId": "324141040",
    "entityType": "Track",
    "nonce": "0xe97eb7fc743bf156b9742c97a75638dcf048c84b0269d12cb0b9ec93addbfbeb",
    "signature": "0xd8f490ef7ec9e1b7546c397b369aec5c35e3cdbdf69955b544c8e95bdd3064057ab825c013f3165c5bcce4420474816c230740c3b1b1727d736db7a83418c5871b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}