{
  "manageEntity": {
    "action": "Save",
    "entityId": "1741884960",
    "entityType": "Track",
    "nonce": "0xf8f7d05c579132253a9b2cb78c62d6891cff9576ba9536f87a4f67d2f777614b",
    "signature": "0x11d74a6d1c42623da404b233f02f75be7ad2f4333af41659fb4304c6d840b7db40cd5ef0b1713284afeaa6489ea61330b122ed496d450e7099cdcbb09d5cfcde1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}