{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030259614",
    "entityType": "Track",
    "nonce": "0x7bce5d8a37d9b04fde4e38b2a79bc555f88b7e44876e92e0d61b1847aba1b5cc",
    "signature": "0x066dae4bd39366e4ff0e84dfe407dcb0d6ce223b8380806c9245cd005c57128f4c754f2517efef1917fb2e63fe5ccb47f7e2f394d04c8e23ef7e546eebacf3f51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}