{
  "manageEntity": {
    "action": "Save",
    "entityId": "414325675",
    "entityType": "Track",
    "nonce": "0x5889933889bee6cf7cb8a8d75ddfbcf7fefb91bf4f4bfefcc9c3723c346acea8",
    "signature": "0xf350410f797b4009763bafbc6d59c830ba3d06bd29d581a4189221431cec689c599eacc722e2c31a01d63ad805cc9b9d06ebddd8a73e66093e62fbde2463811b1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}