{
  "manageEntity": {
    "action": "Save",
    "entityId": "191061563",
    "entityType": "Track",
    "nonce": "0xa7a7680a9ee3c97b4d5d3894303283874ea94761e07f406a351226a81dd3c2b4",
    "signature": "0xc453952fd80b34e41f872fb6e69de7a87cc7f1b70af1832be2bf5cee6be1f2961382d58789fe86b1b00ee3edf5b6e7a11f440d5b0760ca10909650b46ffa9bd11c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}