{
  "manageEntity": {
    "action": "Save",
    "entityId": "221789",
    "entityType": "Track",
    "nonce": "0x6b029683321f5045549ba3e993dd95d5bb76d0e0c6f7ab3247c33b5346f8756c",
    "signature": "0xdee167f1b02b0a581d40dad090c9f0fbc2f11ec29a3171b84ebfde6cb3fac44c682306066d1e8575d42e0f809f7ac349e7eeb4522f59a82b1f55c5aafd1a41de1c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}