{
"manageEntity": {
"action": "Save",
"entityId": "690394975",
"entityType": "Track",
"nonce": "0xb4f75665f26a95dfa12eb43d043b04575102f3a9fcf523160d1cbf9be629ba70",
"signature": "0x21c0984fc3f38b5ad4d90baec9cc8bcf1c065537c08d8aa848c9ced9a8f0449f06bff8354166ac5b47baeb67f61d21d46769369d56969a9f34390399079e5ba01c",
"signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
"userId": "485987672"
}
}