{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766646835",
    "entityType": "Track",
    "nonce": "0xeae76a64ef105f5937614676cdb7ee7f3e5a55e21b9ab7f0f3f7934e6a0d971a",
    "signature": "0x7c0b7098144fb5815b1087a583322ac2a5b2092e1d8f8bc60576cd1b11414f460680365fece179a360ae4f788348a48211780d6147588bfcfb8eb2eba2a967661b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}