{
  "manageEntity": {
    "action": "Save",
    "entityId": "197594763",
    "entityType": "Track",
    "nonce": "0xc5d01d5e0a04723a1a4dbe3f4e329ee270d86809404a19a9acd795955b38ce03",
    "signature": "0xb82d679d4225c7944af451305344df9174047c25fa8dd6d6c1b8559f067b7e6e18681d8d334e40996ddcfb76b470d017afe3c980b8e7899356a4bf294204eaf61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}