{
  "manageEntity": {
    "action": "Save",
    "entityId": "200951",
    "entityType": "Track",
    "nonce": "0x136edc15f3b7a69653b6242deeae1435ad482b46d160b6c9d977f7af55c3ad6f",
    "signature": "0xabeebdf9e8830f47c49de8c1f70c095b8df7f7a4989da287c308202e450ca6f31e5c74e5a76ed47a1b099db6c031c60c4836d7e69e6d8ff5c551fdacc32cb3f21b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}