{
  "manageEntity": {
    "action": "Save",
    "entityId": "529014096",
    "entityType": "Track",
    "nonce": "0x6adec784ec2a47beb905ffd6b1ca9c23007507db5cee732aa9844b6db3d04d6c",
    "signature": "0x45d9ed5457eeecb8b9d766dd4002971ffc44996c34654198c92bb31f3b0c1d1b01d8261bc493eb538d3189d1c5d1162ddfdb877534ec254112ed7a8380720c121c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}