{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015470358",
    "entityType": "Track",
    "nonce": "0x717f39d93d59ea41c428ef8d4a601bc78f5fe6b21c890969e7bbff4e23169ae1",
    "signature": "0x274ad5b7e5f953bca5992c143c71becac8fc9da71686472c6441e734a230af0d4d97a8ac08633ee3ad6cc4820a0f07d387a09cb2a1ea295b18f55eab6026cdb71b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}