{
"manageEntity": {
"action": "Save",
"entityId": "554447203",
"entityType": "Track",
"nonce": "0xcb4da22d39627b478307004a7c0d537c5b1e763967c70758043849c587a44c00",
"signature": "0x2f89cd1ec6bb583db32ce4de3f135da9add84df36acf3dc6372c676f51e2054c3fcf573e02191fe097b61da0a456341d7201d57eaac5f0e10da0ebc97ffb4b101b",
"signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
"userId": "377610060"
}
}