{
  "manageEntity": {
    "action": "Save",
    "entityId": "882936642",
    "entityType": "Track",
    "nonce": "0x1f288e0a5c8adc095b66fae49028349f4d642915a0984757fa6362c89d9c45d5",
    "signature": "0x09f6871105d5ad02adf9b847008f01c8dc42b50812494983be7e00541cf9741f7dd2c14c1fbba61a50495ec7131a6ad6fcb51a999e4bb82a5699e454b89adce81c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}