{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045893370",
    "entityType": "Track",
    "nonce": "0xbf1805d8ec0faf845f836dff39865fe57b61fd17f436a274bfa4e778ebf66783",
    "signature": "0x1d7b20ef61246fe13279b8e7a196992c3cb9226788e174878472cc123f47ba98668c552bdb9f133cce695d984a3c6453d07987270549189d37a0f74b8bb833631c",
    "signer": "0x3c154BbB8f1ac3df4a7721Eef2A2198c385D2a85",
    "userId": "587797478"
  }
}