{
  "manageEntity": {
    "action": "Save",
    "entityId": "238537611",
    "entityType": "Track",
    "nonce": "0xcd96b37c901f21da916df16e81e9a1fa6fe1cd95b60e1e7c72954f73fb2dc387",
    "signature": "0x8b4dab3b278ffb99c7e81b0212158542882efffac6c503044073aa391df3a1b95907aa5577ebb051c9bc6c770e255be0f3ab509968ed7748e28b3ef52cd349071c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}