{
"manageEntity": {
"action": "Save",
"entityId": "1090491992",
"entityType": "Track",
"nonce": "0xc22d4d59140afe82663ef01dfe13f15758bb53675d40791cb3f4c2afbaef3c6b",
"signature": "0xfc40a887a5db30d85f5f009e4c238c11b9e3262890a4f83cbab70a86f0a852910915f8bfdaed211db00efc5c093e12be4d311292284527c10871bf890b8f9e0c1b",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}