{
  "manageEntity": {
    "action": "Save",
    "entityId": "299757696",
    "entityType": "Track",
    "nonce": "0xd89badd76f57a6dd52781f2cb74f4b41bafadb81d6799bc4f5f2250ec2d758cc",
    "signature": "0x28bc6137572512e2c136a6f790492955c629de4818081a8205219af82286a0f857c03b5fc3238d2586fffa806e80fbf5584521667b96c0a78c4b4c29685597ca1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}