{
  "manageEntity": {
    "action": "Save",
    "entityId": "1708207266",
    "entityType": "Track",
    "nonce": "0xf6ff54472af43d022146effc725d27061ed150d3df6d11df4c753027e81c5016",
    "signature": "0x39b689c3c66367cf679dc8bd960473a7275873a939962aee00bae6368ff077f57f4bb9703d1ef27ab90316c525f3a66edc33ae3ffabbf69c58f00954dfbd5d801c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}