{
  "manageEntity": {
    "action": "Save",
    "entityId": "151372383",
    "entityType": "Track",
    "nonce": "0x936eb4a4f9975065e65fa6b8c9ed0613f524c318bbba226ca38741e5958b11e3",
    "signature": "0x2b05009c10b4fb987c05cd2a69d559be7cb3635e5a97607d38dad5c04f4230d92c19a65e77c60815cfa6bc2f48d928eeb172ec1c371aaa9bd74865479c44ce7a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}