{
  "manageEntity": {
    "action": "Save",
    "entityId": "1392957963",
    "entityType": "Track",
    "nonce": "0x633cff1c6fee1d133c9b440d51009b3bcec48909b460189e5972bd0d50b5d247",
    "signature": "0xcc7606ef747bdc09a92f502ae4207f3d6244884b1dbb0cba6704e670ffe79b5e19c10c482b5e7ea5783526ef8b0e6af7603f0a16b0cd53492b7ea6fe08c1d98e1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}