{
  "manageEntity": {
    "action": "Save",
    "entityId": "412019955",
    "entityType": "Track",
    "nonce": "0xd6d6cc70d79cfd1f8f80e6ebad085c724c2d94c0b5b1d52aa87d2127f0397827",
    "signature": "0x72f26019b31061148906a6d8454ceddddc857f7b889c42231baac6723017e51e04a0004c4470ec0902d6f6c7ca7e1b39daeaa9532c1240eb15ed842521d7e6ec1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}