{
  "manageEntity": {
    "action": "Save",
    "entityId": "687065829",
    "entityType": "Track",
    "nonce": "0xdbb10a9131e3ba65dad5dc90fe3de39fbc89dd52e635862e27b3718ab4bc9b00",
    "signature": "0xa6b0c2549b9931f92659986bd018e9aa2a39ab05730821d0b613bb8dac01b5fa4a79d5308e4a014854676db30bb8ee8015f43049d266d8e21fd61277c18dcfed1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}