{
  "manageEntity": {
    "action": "Save",
    "entityId": "2014683868",
    "entityType": "Track",
    "nonce": "0x5f46f44cf967d5ed2daf4b95988385d64365d300bde3e27460929377467b4aa1",
    "signature": "0x84f09b7a9828bf46ca426715df7cea32de1a36aeda52a95b1a6496637c02d7d7583c4c90280e72081a7bfcb2cbf588d7573b333c1974afd83d5c2b8d447ddf9b1c",
    "signer": "0xf8B02289D2776b4B0D5Cc87415be8F09D2212Bbb",
    "userId": "804650248"
  }
}