{
"manageEntity": {
"action": "Save",
"entityId": "1300375109",
"entityType": "Track",
"nonce": "0x916b7df544a8f39e5444a2c60e989a39eeb787dec2697d887d2ddcf6f4876ef5",
"signature": "0x12ad4201dbc32687c99b7a042335d1baba1b0c2af123c56adbe2003720a1b7dc5c9f1844356436b20d25793a07cc4831905b29675f44d8996c09339bfc233bc01b",
"signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
"userId": "528688046"
}
}