{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953844069",
    "entityType": "Track",
    "nonce": "0x9abc2d39612d0412a9046076a3fd29fe89c405b2c2311e91ef4a20c27676c86e",
    "signature": "0x7c09d45c377861d5889cf0a05345099edad1ea4678772a9b54bbe098712afc67181acf5fe68f6422af5d195bee343b51fe9c7ed2ab9abbd7f7b47d14a8b972b61c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}