{
  "manageEntity": {
    "action": "Save",
    "entityId": "395025926",
    "entityType": "Track",
    "nonce": "0xf1b38f6f50a0361ec5a1d9465b4a5463f4458f92ac54554b97caae5810b48f87",
    "signature": "0x8e22fa70f59fe0da6a501667cfe4f4e9c1b940e45ba487993acde9dd802d59b20a8d761fcd1bc7450dc26a7cfccedfc8f2f94ee640bbd3a4fdf7fa8755c489ce1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}