{
  "manageEntity": {
    "action": "Save",
    "entityId": "1694146712",
    "entityType": "Track",
    "nonce": "0xdbde510d5ce3409c445fa2326bd9d7e0829763cc3f9702c7921e4b368b41f6c1",
    "signature": "0xd56d70ade9e689a6e8b3ed2032f267268509d5e8d1175f1f3c43bfa9895fee4b78d43c68fa674e0ea6d2bdd12dc0a4c7e224faf192ef61e6c69da432f55ba6fe1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}