{
"manageEntity": {
"action": "Save",
"entityId": "630686598",
"entityType": "Track",
"nonce": "0x3335083bd0238ba5c14107c56b41371dca63efc50bc0e80dc1d44c75deb742eb",
"signature": "0x7f8494e70b6b11e60ee528440d6944b751a797b3d61f1c3101821eba9e67491642d7a0dd772b4d83ca8fc1cfa577d4a5f4511f15d8a1b5ca4c9d060441151c0c1c",
"signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
"userId": "377610060"
}
}