{
  "manageEntity": {
    "action": "Save",
    "entityId": "1840115816",
    "entityType": "Track",
    "nonce": "0xfcf101bdc656fdaa053ffa48956b408c52650b40499093f381135b5a2ee14707",
    "signature": "0xe0e99b97506a406ef75af25a07fcef2f893f904fb657acc3960144b6a1b0774d17b7b700f94beef9c2902626b9c2210c9fbe641fd8ea7261f10e0ecc4a256f5b1b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}