{
  "manageEntity": {
    "action": "Save",
    "entityId": "678182204",
    "entityType": "Track",
    "nonce": "0xe9d1ff2a5af6ea6caa3295d10e7ed9da8c1c9202420e87e7e3b46ae45df5556d",
    "signature": "0x16d397e7fca1831fd9c7a7d371e9401017bfd0a2f42a77a9595f76aacbdf6152207e621c26e24c060fc7f6cae7d96668fa4d0fc373d943454fe4663d42b19e141b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}