{
"manageEntity": {
"action": "Save",
"entityId": "452454146",
"entityType": "Track",
"nonce": "0x07bbb6b254204980059ad7a2095771d0650f91fa03659ba3e63add9f075bf035",
"signature": "0x3d6da41cd36a4e9f9de9b2f3ce6192080e8a69f8c131b2ec2e889244c0d05be277ee8d9eeccf39fd0fcce9dffe29715d8c40cadfd650d9d8b75c5b6f16a2fa101c",
"signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
"userId": "280440301"
}
}