{
  "manageEntity": {
    "action": "Save",
    "entityId": "272927389",
    "entityType": "Track",
    "nonce": "0xf8f348776079c9d79936a885d2a1d34191de490c339f37b5dc1123712cccb2bf",
    "signature": "0xc9c8edac3ba2c7df9042833c945241e23d685255e2d84aeae6b31a1ff507ed3f6fd1e56100e4ee77553fd3621214099f9a1d6e1b9405b3be534163057e2791471b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}