{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981618441",
    "entityType": "Track",
    "nonce": "0x61175a7258243e466d5cf848b0a792544a880f229001d191176e13c43757ba68",
    "signature": "0x67ba997b0ab2a56c04cf941863cc6de5861ccb760131db602de44b657539192e152a632fb7329ebc6f58244f1b174743726e4a78c3153ae2af999c5d371dcc651b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}