{
  "manageEntity": {
    "action": "Save",
    "entityId": "536671",
    "entityType": "Track",
    "nonce": "0x971b00da06fe22aac60a0b7c62763a090d723b9ab342c64c2b07cfd706e15149",
    "signature": "0x64e13d175efb372546d1bfdfeaf80f1fe0924a97b1ff522057c9f3a6a73b2e9853c64c87dfaf80ddd0191b9222749441f348f9543252c0e4c66816d78612628d1c",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}