{
  "manageEntity": {
    "action": "Save",
    "entityId": "1587653409",
    "entityType": "Track",
    "nonce": "0xf8f95e32487a0036685621a780fc854040e629dc67332afc405eb1c5a1cefa64",
    "signature": "0x295497724cff164b123cbfd414274d6d0a38891efa80354eaf61e31b6619aece0a90ee9528c1adaf102df5a42914d457774e7ed9a081c3dec1bb76e5dfe93e1c1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}