{
  "manageEntity": {
    "action": "Save",
    "entityId": "63199",
    "entityType": "Track",
    "nonce": "0xc03751e8160856316284400a2cf1b2b6ee959ff26ca4ca07b9ed9a67ae5fe8a7",
    "signature": "0x221f2dba75f5040f739216e533557be9ac854015753f0ef5f49bb3b0829445752514ea88cc4ff2a15bcbc54db07c97dfd7e2e2212ae69075a371ac27c584046d1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}