{
"manageEntity": {
"action": "Save",
"entityId": "564785301",
"entityType": "Track",
"nonce": "1793730362009873368",
"signature": "0x9812d37b066e2da2e3a91cd8d7a6cc6cc95cd5d1049841e859aa239a62fcf19505cca8205e73472f1d0cdaf3b99e941603fda3bf92fc6b62dddca32fa0bd10971c",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}