{
  "manageEntity": {
    "action": "Save",
    "entityId": "542388527",
    "entityType": "Track",
    "nonce": "0x69f5220668682554a91d2d5d58ba10a4db3f4592e74209f0417b15c2592be2e9",
    "signature": "0x184f0fb78fbd3bb14f637689b376816535e8d42f298c50d4582869d9558ad4072742edea62e03524f1f5ddd61d3acb8004a4d4af21533ffa41d389119d6bb2d21b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}