{
"manageEntity": {
"action": "Save",
"entityId": "218573840",
"entityType": "Track",
"nonce": "0x3ec2b212b24ae391c4e5c190cd253a80e14f8515257cb3a878efc3b33119b1f2",
"signature": "0xb47308a03ed1071d44b2d03415ad2e0fdd34699eaa0ff4d8866f15bd78fdb52d6f73212a3e60d3586d6842383561fa01545d56bd7b4b90c93cdf00ade84e2ebb1c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}