{
  "manageEntity": {
    "action": "Save",
    "entityId": "743254161",
    "entityType": "Track",
    "nonce": "0x9aba951cdee2f793d44ee19b2fd343a5c1556fb69a4a7aacfbd3a06f21a94de8",
    "signature": "0x4336ef7dca3aac793b1865a1e3f0fa2c88d55d32e7d49199160e2acab5e7b458706076d77fd005908ba9bbbdaaf724b18d98cf3483d18672e30935ac818a15221c",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}