{
"manageEntity": {
"action": "Save",
"entityId": "898595430",
"entityType": "Track",
"nonce": "0x00ac1f0f815bdbcef5d11060cf9a5e42ab047361470b65dda8590f38e042b272",
"signature": "0xd297c20f893df96cefca998dc7182ebb441ebc1dc3ee09fec9a2027f1b33d7401fdd14c9696146a5e132a5ea0c6357cd4290f6508509b979d1a2dbc39ad75f751c",
"signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
"userId": "854614078"
}
}