{
  "manageEntity": {
    "action": "Save",
    "entityId": "291719475",
    "entityType": "Track",
    "nonce": "1792404755605580751",
    "signature": "0x5bd2131c5a1e8c81c7ffdb1944893c30e99e88425847de3f51a007d9b2e29456102a7e8ab9015f0353d0024402993e05e7a97e278a013dfb1e5911556dc717f51b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}