{
  "manageEntity": {
    "action": "Save",
    "entityId": "794158615",
    "entityType": "Track",
    "nonce": "0x7ab18a188d8362922572b6d94bf81e161418ab846cf2a25a7a7c4bf57c5054c5",
    "signature": "0x1a35ca0da6f83107341585e804a1d353d0a542d6e436df73fd6cc80692b0428722b7fc71c0e501c525d457145fa4f03cbbdc084b78098305da762efcba86f8411c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}