{
  "manageEntity": {
    "action": "Save",
    "entityId": "41949565",
    "entityType": "Track",
    "nonce": "0xe737d0ad319107901a08e9a74f984326cd19faf8745e36016b0682fbfcf91daf",
    "signature": "0x93d830cb63a5001029708ed1a42be4b4d9be42c6d769a2f4b8aabdeab4482fa46fad88bb2e25ddf27d4fbc23758a172cafdb9aa372c3ab4203fa3b7496da4c401c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}