{
  "manageEntity": {
    "action": "Save",
    "entityId": "573477424",
    "entityType": "Track",
    "nonce": "0xd2f7b2bc4494fbc824b20fa224ec4a91709f9fd5e5431898d502d513e16f2e20",
    "signature": "0x7fb8785b821caa21fc72617b1b1720c0168f33827eff3ed03835790b9e8aad616d490a16264beda445f44d6e8959fe2a762f6bc9ecec150196dc870fcab7aa9d1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}