{
"manageEntity": {
"action": "Save",
"entityId": "388290360",
"entityType": "Track",
"nonce": "0x5207f8bd2ced041a3ecd2ea4ed74304d5010baadbfbe65747d68f883719e650d",
"signature": "0xdbf7d5bf242e03f0502bad10893a39392286ff38878ac799a6727c8a5dee569a1c4bdf2ed9482964f9c2b8972ce29592d695ca3a90d6af643a42637a01b5f8f51c",
"signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
"userId": "854614078"
}
}