{
"manageEntity": {
"action": "Save",
"entityId": "666442775",
"entityType": "Track",
"nonce": "0x59637be47340cc6564a9cdb209a4e47b1aa031762e055b5493c8ef9ddd069927",
"signature": "0x64f926625844db336115b12250b0b289f7a06817a896415869610f6ed0740c360a5364fbe00bb0deed7085c27356be26b1b2f8e3072fa98a61b100d039ff21581b",
"signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
"userId": "670307808"
}
}