{
  "manageEntity": {
    "action": "Save",
    "entityId": "1267842468",
    "entityType": "Track",
    "nonce": "0x3575fe337034efea8a67dc38f4df8b612fbb0fb6d9f568ff83d9d8eaf3d0e134",
    "signature": "0x3870d554205d624b63a1c645d67495cf0e4818d85f41fc885b9afe517094b6394bf48e0021deebe503c5d6cc5c8f26d06b680e1c096e1e16f042e3635295c8751c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}