{
  "manageEntity": {
    "action": "Save",
    "entityId": "2022446039",
    "entityType": "Track",
    "nonce": "0xa3af140fa208eab73f857b31938a0a1ca43d4fa4a483229d6d721621dcd31b3a",
    "signature": "0xb760783048a750d63c56e2701e5da266416106b28904143748462b3ee7c258f70dd9c486f023486da3aa1149e328ae1028a34de0dc4ca64272299026cb4dc8eb1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}