{
  "manageEntity": {
    "action": "Save",
    "entityId": "88020",
    "entityType": "Track",
    "nonce": "0xec484c3c943d5fdc218a2d83ec227e8defc4fb921665fd5b25736a2655142114",
    "signature": "0x5b0ef4a8ad097318186d004af013c021aa324945356d6e99de5f5952a7dd690b24243dcf73aa940bb214fc2075a1189167670f87951ebbe020fa42a3bb9c9b3c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}