{
  "manageEntity": {
    "action": "Save",
    "entityId": "977867689",
    "entityType": "Track",
    "nonce": "0x92814f916fdfe7f05e57ab44621db7f1cdfcd13ec0dfde6605a32f3f0bb03815",
    "signature": "0x36fa15545706e2370ce8cab30ce86a426b6e7d23897b5094b595302554881198616d72ffbd537bb065c06b674fa2a084951f0fcad5451946855be33f6fabffcf1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}