{
  "manageEntity": {
    "action": "Save",
    "entityId": "308675",
    "entityType": "Track",
    "nonce": "0xf00bb025c78afc03fbc356aaa30a9a899ab10f82825b3eeaa6b074910af90b29",
    "signature": "0xf7ea7b90383109fe36a60685224aac3193b025bdd25bc4f8cead7b0318a6aa532096ff8548b6af4ac882bda4a47336a6f84296d513706c849f3f88da615aa9a11b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}