{
  "manageEntity": {
    "action": "Save",
    "entityId": "1725665282",
    "entityType": "Track",
    "nonce": "0xa7b5a371419eec65e498121cd0111def9de634e79a3176daf05bc82913865dd7",
    "signature": "0x1cf710f5ba049ac9c13b2b808b44588a5b3fffd4f36f44f85eb06d1fa338ccfa411af4ccfcbe9c917d74142b4dcbbc55d38402c1a43c56efd6cfb92b94dcdec11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}