{
"manageEntity": {
"action": "Save",
"entityId": "321953979",
"entityType": "Track",
"nonce": "0x86bfaf77e1eda9bf71fa207d75a12cb0a46e5a916a84946b7dac06c485ddd1f3",
"signature": "0x3666d76edf5656fc622d8ae9d8ee2fc90009b1bac511f8c1ccfa1c9796cd235e40b102c16dcb56b82de1b16b9eb6df65728155772fe34352af0a5a98b49fb1921c",
"signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
"userId": "881446128"
}
}