{
"manageEntity": {
"action": "Save",
"entityId": "723332121",
"entityType": "Track",
"nonce": "0x21ebfb9c35521812e59ebc17659d71b0eeffc7a425d3cde6ce39295325256356",
"signature": "0x54398ef7561f7f126f15cd1a6fac760ea5b0359aee39b0b14d287b2316ad266218942cefd98bba2e448377730f87ca5e02f0f8eb83763c9d7e6a20550743b26b1b",
"signer": "0x5aaD03EeeA903717f9a4E922505de7C75223d53F",
"userId": "143226702"
}
}