{
"manageEntity": {
"action": "Save",
"entityId": "1990762091",
"entityType": "Track",
"nonce": "0xceed6ce7e8b22006a00736332e86deffcc0fa529a3ad34cead6c190b3a4ba3ee",
"signature": "0xa1d47d673f2ec17ef8f72b6b732990b376a9afd8330e4291026325223bb061482cecc210241019e5d5035ad1f1c770cc29a95b875bf6ab1b096ab4d8c2f5ab3a1c",
"signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
"userId": "636236864"
}
}