{
  "manageEntity": {
    "action": "Save",
    "entityId": "272818009",
    "entityType": "Track",
    "nonce": "0xede72df5e7020398df74af640bbb5f6f5832e6bd43159cfffd2997d9d359054d",
    "signature": "0xf61229e8a9da347b8f3b8801c048baf26ab5b4e7e7de61d9609fb25096a494a5474623a53af7edf8de3a1edd4aef544bd13c99928c2880d25c535c922be2739d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}