{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689127283",
    "entityType": "Track",
    "nonce": "0x81828ffc9f6b6bf9a8cd7f87783c1cbcdbe561119f54c9f60547cd14d457e832",
    "signature": "0x642bb3317941455d54caa55f26a7e570b3569bd05e6ee9b14dd01f7faf08325e0b7b1eeba74d52d0796f8a4e0e2f0ced463d6dab1323ada1aa1089d20de5bde81b",
    "signer": "0x8d9D00A94c3B1C9992e3CA4386AbBC6345B2E876",
    "userId": "396658415"
  }
}