{
"manageEntity": {
"action": "Save",
"entityId": "45492205",
"entityType": "Track",
"nonce": "0x58941a739917a29e055bf9a6c2393fe299d5f6a75224168e778b2eeb6ecfd31f",
"signature": "0xc44bb958d84fe3ed5db13a70b08f7421322a4341a622df1345222aa76e3275847f87fd717b28b910b89a7aa43fe8646bb5bed18421d24555951f2734478e08ea1b",
"signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
"userId": "889450527"
}
}