{
"manageEntity": {
"action": "Save",
"entityId": "107925093",
"entityType": "Track",
"nonce": "0xd9e9cf01267fe579b79b634f3aebe63dbc8df4ee82ba83e5695b59da874757a1",
"signature": "0x2c681a38fbd39fcda13511ede3f585a8036635271c4a75ba2edb660021f1b51d6d81f982729196b801ab42851ca57ccccf5dd46c736a42daf5f6fae39e3d229f1c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}