{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019841",
    "entityType": "Track",
    "nonce": "0x17ada2cfc94c51adbfdc413f1a44ed8a1ce427c67b67585233aef45fa3d552f9",
    "signature": "0x4ca2f49ba255d24ae111888d970a6089f6a7dc308ed87179fad0801bf6963846425e11cc9129c19186c3d34de25284df3ca5afc777aff184209bed617ed301861c",
    "signer": "0xbb3E94A6Ca25f3CAF1B8487768C074bE200e6381",
    "userId": "277460613"
  }
}