{
"manageEntity": {
"action": "Save",
"entityId": "399892480",
"entityType": "Track",
"nonce": "0xfef395731e13fe942e48ba43d872d74f5f0625a18beb17f8c54a57106bb33d66",
"signature": "0x4b8dab3825982976eaf3dacdb95bb7b1c41d7443b8c2601b5b0b4e2b8e170b3658586ba07cbc7cc2a5df4ab0dcb2a624aa884d120eb81e0db0b1541d42120a2c1b",
"signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
"userId": "111467392"
}
}