{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004077067",
    "entityType": "Track",
    "nonce": "0x840a4f64970a7e31f3c8712a87f6c0ce9aead41b5eea2d2e82e99927c013f678",
    "signature": "0x2122dbece75ddc017ce1a5e8cdb79f98cababdc53c1e1b7dcb4cb7cfaad94bab2618c732cdcba2f8fa38399283d35a2956d8791bcd5b70a04efdbf9b05bbae051c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}